因此，本文根据积木原理，设计了一种积木式的组合钻机，通过更换不同的部件和装置以适应工程勘察和砂矿钻探的多种用途。

But each of the drills has different applications and features on the basis of modular design, a combination-type drill which suits a multipurpose of site investigation an…

youdao

因此，本文根据积木原理，设计了一种积木式的组合钻机，通过更换不同的部件和装置以适应工程勘察和砂矿钻探的多种用途。

But each of the drills has different applications and features on the basis of modular design, a combination-type drill which suits a multipurpose of site investigation an…

youdao